CLI Tools python Advanced

Argparse Subcommand CLI

Multi-subcommand CLI with argparse: each subcommand in its own function, shared logging.

python

import argparse, logging

logging.basicConfig(level=logging.INFO)
log = logging.getLogger(__name__)

def cmd_build(args):
    log.info(f'Building {args.target}')

def cmd_deploy(args):
    log.info(f'Deploying to {args.env}')

p = argparse.ArgumentParser(prog='mytool')
sub = p.add_subparsers(dest='cmd', required=True)

b = sub.add_parser('build');  b.add_argument('target'); b.set_defaults(func=cmd_build)
d = sub.add_parser('deploy'); d.add_argument('env');    d.set_defaults(func=cmd_deploy)

args = p.parse_args()
args.func(args)